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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicEasy2 minQB

PhysicsEasynumerical

All the edges of a block with parallel faces are unequal. Its largest edge is twice its shortest edge. What is the ratio of the maximum to the minimum resistance between parallel faces?

Answer:

4.00

Solution:

Let the length of various edges in increase order be $l, x, 2 l$ respectively

$R_{m a x} = \frac{ρ 2 l}{x l} = \frac{2 ρ}{x}; R_{m i n} = \frac{ρ l}{2 l x} = \frac{ρ}{2 x}$

$∴ \frac{R_{m a x}}{R_{m i n}} = 4$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: QB

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